Abstract: A chlorinator for swimming pools in which a quantity of granular dry crystals of chlorine is interposed in a bypassed stream of pool water for creating a chlorine concentrate in a container related to a mixing chamber such as to introduce a measured portion of the chlorine concentrate into the bypassed water prior to its returning to the swimming pool.

Abstract: The chlorinator for a swimming pool with a recirculation system includes a container to hold a column of chlorine concentrate solution, and a pool water supply conduit with a flow regulator connected to a return conduit of the recirculation system. Some of the pool water is caused to slowly flow into the container forming a gradually increasing column of pool water above the chlorine concentrate solution inside the container. A layer of separating material, having a specific gravity between that of pool water and that of the chlorine concentrate solution, rests on the bottom of the pool water in the container and floats on top of the column of the chlorine concentrate solution, and effectively prevents mixing of these two liquids. The gradually increasing column of pool water in the container then gradually forces the chlorine concentrate solution out of the container through another supply conduit to a height between the top and bottom of the container.